CVE-2026-35616
Fortinet FortiClient EMS Improper Access Control Vulnerability
Fortinet FortiClient EMS
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 6 April 2026. US federal agencies were required to remediate it by 9 April 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 88.9%, which is higher than 99.8% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
Frequently asked questions
Is CVE-2026-35616 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-35616.
What does CVE-2026-35616 affect?
CVE-2026-35616 affects Fortinet FortiClient EMS.
How severe is CVE-2026-35616?
EPSS puts the probability of exploitation in the next 30 days at 88.9%, higher than 99.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 9 April 2026.
How should organisations respond to CVE-2026-35616?
Apply the vendor patch for Fortinet FortiClient EMS as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.